airbrake-ruby: fix add_filter block API

Fixes #8 (add_filter throwing exception)

CHANGELOG.md

@@ -1,13 +1,20 @@
 Airbrake Ruby Changelog
 =======================
 
+### [v1.0.1][v1.0.1] (December 22, 2015)
+
+* Fixed the `Airbrake.add_filter` block API
+  ([#10](https://github.com/airbrake/airbrake-ruby/pull/10))
+
 ### [v1.0.0][v1.0.0] (December 18, 2015)
 
-* Improved backtrace parsing support ([#4](https://github.com/airbrake/airbrake-ruby/pull/4))
+* Improved backtrace parsing support
+  ([#4](https://github.com/airbrake/airbrake-ruby/pull/4))
 
 ### [v1.0.0.rc.1][v1.0.0.rc.1] (December 11, 2015)
 
 * Initial release
 
 [v1.0.0.rc.1]: https://github.com/airbrake/airbrake-ruby/releases/tag/v1.0.0.rc.1
 [v1.0.0]: https://github.com/airbrake/airbrake-ruby/releases/tag/v1.0.0
+[v1.0.1]: https://github.com/airbrake/airbrake-ruby/releases/tag/v1.0.1

lib/airbrake-ruby.rb

@@ -275,9 +275,9 @@ def create_deploy(deploy_params, notifier = :default)
     # Calls +method+ on +notifier+ with provided +args+.
     #
     # @raise [Airbrake::Error] if none of the notifiers exist
-    def call_notifier(notifier, method, *args)
+    def call_notifier(notifier, method, *args, &block)
       if @notifiers.key?(notifier)
-        @notifiers[notifier].__send__(method, *args)
+        @notifiers[notifier].__send__(method, *args, &block)
       else
         raise Airbrake::Error,
               "the '#{notifier}' notifier isn't configured"

spec/airbrake_spec.rb

@@ -6,7 +6,7 @@
   end
 
   before do
-    described_class.configure do |c|
+    @notifier = described_class.configure do |c|
       c.project_id = 113743
       c.project_key = 'fd04e13d806a90f96614ad8e529b2822'
     end
@@ -161,6 +161,18 @@
 
   describe ".add_filter" do
     include_examples 'error handling', :add_filter
+
+    it "adds filters with help of blocks" do
+      filter_chain = @notifier.instance_variable_get(:@filter_chain)
+      filters = filter_chain.instance_variable_get(:@filters)
+
+      expect(filters.size).to eq(2)
+
+      described_class.add_filter {}
+
+      expect(filters.size).to eq(3)
+      expect(filters.last).to be_a(Proc)
+    end
   end
 
   describe ".whitelist_keys" do